Sewing-machine.



(L GRAY. I SEWING MACHINE.

APPLICATION FILED AUGJS, l9l 5.

Patented Aug. 7, 1.917;

2 SMEETHIQHT a.

WITNES 8:

ATTORNEY C F. GRAY.

SEWING MACHINE. APPLICATION min Aus.2s, 1915.

1,235,793. Patented Aug. 7,1917.

2 $HEETS-SHEET 2.

wmvssfs; mvehm'lr Z I E 7 Q? 16' W 1 ATTORNEY UNITED STATES PATENT OFFICE.

CHARLES F. GRAY, OF SIERRA MATURE, CALIFORNIA, ASSIGNOR TO THE SIN GER MANU- FACTURING COMPANY, A. CORPORATION OF NEW JERSEY.

SEWING-MAQEINE.

Specification 0': Letters Patent.

Patented Aug. 7,1917.

Application filed August 25, 1915.1 Serial No. 47,288.

To ulZuw/wm it may concei n:

Be it known that I, CHARLES F. GRAY, a citizen of the United States, residing. at Sierra Madre, in the county of Los .Angeles and State of California, have invented certain new and useful Improvements in Sewiilg-Machincs, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention, while adapted to loo takers of different kinds, relates especial y to theclass of loop-takers performing a plurality of excursions from loop taking position for each rechprocation of the needles with which they cooperate in the production of stitches; and it has for its object the pre-- vention of the repeated entrance of the same needle-thread loop by the loop-taker beak.

Insewing machines employing plural-rotation loop-takers, it has been the practice to'employ a vibratory take-up lever actuated by a. crank and link mechanism in order to permit of the high speeds at present demended, and this has involved the premature commencement of the take-up action andthe' consequei 1t handling of an excessive amount of needle-thread by the take-up in order to insure the drawing up of the thread-loop discharged by the loop-taker sufiiciently'early to escape reseizure by the loo -taker beak in its idle excursion.

nether source of diflieulty in thislclass of machines is the sluggish action of the tln'ead-controller or check-spring between the tension device and the needle occasioned by improper adjustment in relation to the size and character of the thread. This is liable to prevent the proper control of. the thread-loopshed from the looper-beak in its loop-casting excursion whereby it is caused to be entered by the beak in its succeeding idle excursion.

According to the present improvement,

the needle-thread loop shed from the loop taker beak, and articular-1y the live or active limb thereo (or that'leading through the needle to the take-up),is mechanically controlled by means beneath the work-suP- port and independently of the loop-taker, so as to insure the maintenance of the needle-thread loop ut of the range of movement of the loop-taker beak in-its idle excursion.

The present improvement is preferabl embodied in c looptaker of the rotary hook has preferably type such as that embodied in the sewing machine represented in my Patent No. 1,115,663, of November 3, 1914, or in my pending application Serial No. 817,737, filed February 10, 1914, the loop-taker being fixed upon a substantially Vertical shaft slightly inclined to the path of reciprocation of the coiiperating needle upon an embraced by a plane transverse to the direction of feed. The loop-taker is preferably formed with a. cup-shaped body having a longbea. r with its point at the upper or outer end thereof and provided with a Wide annuiecr groove or race-way in the opposite walls of which are journalcd the parallel annular supporting ribs or tongues upon the periphery of the thread-case thus sustained by the loop-taker, the said ribs being interrupted. upon one side to produce in them respectively thread catching and th read-detaining shoulders, the one engagirg the dead limb of the needlethread loo orthat attached to the material,

in the initi portion of the loop-casting opture release of the loop after the castingop oration to prevent entanglement.

The thread-case is preferably provided with a forked lateral lug loosely embracing a holding lug depending from. the throatplate for restraining it against rotation with the loop-taker. The. hub or boss of the hook which is secured upon the hook-shaft formed. thereon an actuating eccentric with which is operatively connected a vibratory opeuer-lever mounted upon a. fixed fulcrum and formed with a. shoulder adapted to engage the forked thread-case lug to open a passage between the sameand the holding lug for release of the needlethread loop passing through the same to the needlediole of the throat-plate. The operative portion of this vibratory lever is dis posed adjacent the needle-path and intermediate. the upper or outer edge of the loop taker and the throat-plate, and is provided in its lower side with an undercut recess or cavity through which the lower thread normally leads from the thread-case to the needle-holeim the throat-plate. Theformae tion of this recess affords at the end thereof beak, an oppositely extending spur or finger.

I 1.95 toward which the loop-taker beak 'movesin" .being produced at the other end of the recess serving as asupport for the needlethread loop in and su sequently to the loopcastin operation.

As t e loop-taker beak reaches loo -shedding position, the opener-lever a vances intoengagement with,the' thread-case lug,

ing the final or stitch-settin action of the ta e-up. The needle-three loop in the casting operation having been drawn into the recess of the vibratory opener-lever, from the time the thread-loop is shed from the loop-taker beak to the time of its complete release the live limb of the loop'rests upon the supporting finger of said lever so as to be forcibly retained out of the path of circular movement of the point of the beak,

. the point of the beak passing beneath, the

shielding spur or finger of the opener i ever just as theloop is finally released from confinement between the-thread-case detaining shoulder-and the heel of the loop-taker for the final stage of the take;up action.

' It will thusbe seen that the loop-supporting finger is the -feature of'prlmary importance of the present improvement in that it holds the thread-loop out of the range of movement of the point of the loop-taker beak, but that this element is material1y assisted in thecontrol of the needle-thread Patent sloop by the shielding finger which covers the point of the loop-taker beak just as the loop is finally released for the stitch-setting action. It is preferable although not essential, to form the pull-o ii 'shoulder, in order that these seV158leleiiientsmay be confined in a single member the interestof simplicity and compa'etn In the' accompanying drawings,

much oflth'e' sewing machine is represented to the present improvepreferablyfconstructed as shown in my'said tion representing the needle, logpetaker-an'd take-up with the-thrjsad-eoriti-ollihg means beneath the throat plate in the initial portion of the loop-castin operation, and Fig. 2 a planyo-f such' of t e same parts as lie beneath tliethroat-plate in the same positions. I the several partsin the positions which they occupy as the needle-thread loop is about to Figs; 5 views representing the the needle-thread loop Fig. 7 is a perspective view of the openerlever actuating means, Figs. 8 and 9 are vided with Y the apertured upper end of the pitman 5' the shielding and supporting. fingers upon. theopener-lever provided with,

only so Figs. 3 and 4 are similar views with perspective views, taken respectively from the top and bottom, of the arm of the opener-lever containing the'loop-controllin elements. v Fig. 10 is a perspective view 0 the loo -taker and Fig/11 is a perspective view of the bobbin-case. v

As represented in the drawings, the .machine is constructed with a rotary upper or main-shaft 1 with which is connected by means of a well known form of double crank-and-pitman connection the lower shaft 2 rotating in unison therewith. The mainshaft carries the usual crank-arm 3 prothe lateral stud 4 embraced by similarly connected at its opposite end with the stud 6 upon the collar 7.,fixed to the reciprocating needle-bars carrying the eyepointed needle'9. v

As disclosed. more fullyin the United States patent to Dial & -Dimond No. 695,915., of March 25, 1902, the link 5 has adjacent the crank-pin 4; a laterally ofiset portion 10 upon which is fulerumed thebearing sleeve 11. Slidingly fitted within the bearing sleeve is the arm 12 of the angular take-up levermounted upon the fixed ulcrum-stud' 13 and provided with the curved operative arm 14 end the thread-aperture 15.

The needle reciprocates through the usual aperture in the throat-plate 16 which is provided with the depending thread-case holding lug 17. bushings in" the spaced bearing bosses 18 of a bracket 19 disposed below the throat late is the substantially vertical hook-sha t 20 having fixed thereon intermediate said bearing bosses the spiral gear-21' meshing with a similar gear 22 of twice its diameter secured upon the lower shaft 2 which thus imparts to the hook-shaft two rotations for each rotation of the main-shaft 1.

. Fixed u'pon and rotating with the upper end of the hook-shaft is the depending hub 23 of the cup-shaped body 24 of the book The hoolfis f rn med with a comparatively long beaiFZQ/hdting its pointslightly below ripper edge of the hook-body which is fonnld at the opposite or heel. p0rtion with (liter-gently extending fingers 26 and 27 'f 'irming between them a fork 28 spaced inwardly from and embracing the break 2? ,Nearly opposite the throat 2!) of having at its outer J ournaled within suitable.

axial.thread-cavity in 'vvhich'is formed an annular groove or channel 31 whose oppositeside wall-s constitute the bearing pmtions of a raceway to which are fitted the corresponding walls of twounnular ribs or tongues 32 formed upon and constituting the supporting means for the thread-case f :1 forked lateral log 37 ailortling Sl'lOt't lint 33, as shown more fully in my Patent No.

of November 14., 1 lhe time: Geese in formed :it one male oi. its: uln ier lge with a lateral flange 3d: eontain-- ing the three roove so through whieh the lower thread led to the work from :i hobhih 36 within the threnthe: to. The tie livery end of the flange forms one men a reeeee log 17 38 loosely embracing the hot deuennling from. l f he (renter oi. the cylindrical hnh't3 is eii'eet from the axis of rotation of the hook. .titntes an actuating eetentrie which p 39 at one :1 of a nperti'lretl oppit ernhraiiree ii stud .fl. upon one men 452 of a IlfiClF-lfiflfil." whoee hilih t 1% tnlennnecl upon the stud =44; :11 tnineil hy the hinuehet 19, anti Whose oppo. iv :Hhfi. imwartlly ext angular arm i has w en ite npp ilx 4U Within ti of the eerew 'l moment of the it at loop-seizing it enters Tl whn 1.1 lever 4 onioel up (siren '[H'tlll'l the i, and the he path ion i m,

e111 titty :1 pm'tion of the e eonetitntee :1 part of the vihri 43 4' slightly oveirha n. of the hook on mm'ernent of the point t l .afore lies between the limttmn of the tln'oat-plnte: The outer pm'tion of the arm formed in its miller side with. an elongated undercut recess or cavity 49 thee protlne .ng; op 'iositely extending fingers 50 and 51 with a lower thread pull-off shoulder at the base of the finger 50, mi. :lhru iit content shoulde' 53 hein proviai it late base of the fil 51 for engm' the side of the thread-owe log the flan e 34, as represented in Fig" As w] l he later more fully fingel." 50, the top of which lies inter tl' the plane of movement of the point of the Iowa-taker book :11 l the thro: etitutes :ii loop-tin)poi-t upon will of the tlu'etufl-loop is placed it taker in the initial sta e :zu'rtion, Where it remains until 1'e.. i:1st l the loo i-teker at whieh instant t l the hook is covered by the fiatttmed finger 51.

n the operation of the machine, the (lie (lee? ride, and. it begins to rieo for i. lltillll n of :1: loop of its threat pointo'f the heal; enters the tin, and in the initial clisite ition tl'iereot (l: the li e limh o within the cavity it? l' opposite wi. eh it is released as such over the enppoi-ting finger 51, the lower thread h at thie time extending from the threeLl-eaee through the cavity 49 and above the if" hr :31 to the needle itjJkzlIJ'hlllfO of the ate, as represented in Figs. 1. and E2 the hook eol'ltlnnes itn initial ext-er eie l irmn loo seizing 'poeititm, the "threadloop, dead linih o of wl'lic'h remains omgngecl by the detaining shoulder of the threatlwnee, is cost about the latter to the loop-eh (ldlflg p on represented in Figs. 3 and at, whereln both limbs; of the wiedle-th end loop and. the lower thread extend through the cavity 49 to the needleholei In the continued. movement of the hook, the tlirend-loop is (irmvn oil the git'iint of the heat: and along the guard-linger E26 and into the for]; 28, heingthereafter drawn upwardly upon the discharge finger 27 from finger passes the detaining slnmlrler 32" of the lmhhin'euee rih 32. Joe: prior to the t oi releia... of the loop, the point of "l beneath the shield t nn'ehy prevented from ng the loop in its 0nd or idle exonreion from loop-seizing position and tl'lerel hi 'llkill'hgf the thread. As repreand 6, the needlethread "t point of release from o the neetlvle'hole over finger 50, no that in the r ovemont of thoheak its in: renemure of the loop isinsnred. notion oi. the tnkemp and of the ring; shoulder 30 upon the i need are [l rihetl in my said latnt No. 1,115,663, :llltl neecl not therefor h J lienlly i'leserihed herein 1 my; time set forth the nntnre of the inventnm, what I (lillll'i herein is:---

L In. :1, sewing nmehine, in e0nihinntion a reelprowling liUMllt-t n, eirt illUYll'lg loop-mite]? prov with :1: loop-seizing leak, luffllllftlitil. actuating mean and i loop-enmiiort :ic' nvent the needle-path and :nlinitetl to hohl out of the range of action of the pint of the beak a needle-thread loop one oil by the beak.

2.: In :1, sewing machine, in eoml' ination, prmaiting mile, at liiironlnrlv moving tii'ier 1' witl'i a loo seizing Loon-tnher actuating nieinie,

u atljatein the neetlh v l t t of the 12mg oi :ietitiin of tie it of the lQQtl-Ii a neeclllv threizitl loop cast it the heel; anti. :1 shield for the beak :l lliiop-enpport. i n sewing i'naohine, in combination, needle, rotary .loootaken- ,1 a lfnilhi ielzlllg a thread tht ein over i o i the needle ere paseecl by the loop-taker and provided with loop-detaining p m Y i L mi n 1. wee j onrnal: threml loop. heel:

- a shield positioned to overlie the beak actuating clement rigidly connected to and tuating means, a loopsupport adjacent the needle-path and adapted to hold out of the range of actionof the point of the beak a nee le-thread loop cast off by the beak, and int at the termination of the operative p Eiod of said detaining means.

4. In a. sewing machine, in COlTlblIlflilOIl, a reciprocating needle, a. circularly loop-taker provided with a 'loop seizing beak, means connected with said loop-taker for imparting to the beak a plurality of excursions from loop-seizing position for each reciprocation of the needle, and a loop-support adjacent the needle-path and acting upon a needle-thread loop cast off by the beak in one excursion of the latter to hold it out of the range of action of the point of the beak in the succeeding excursion thereof.

5. In a sewing machine, in combination, a, reciprocating needle, a circularly moving loop-taker provided with a loop-seizing beak, actuating means therefor, and a loopsupport sustained adjacent the needle-path independently of the loop-taker and adapted to hold out of the range of action of the point of the beak a needle-thread loop cast ed by the beak.

6. In a sewing machine, in combination, a reciprocating needle, a circularly moving loop-taker rovided with a 100 seizing beak, actuating means therefor, an a loopsupport movable differentially of the looptaker and adapted to hold out of the range of action of the point of the beak a needlethrcad loop cast ofi by the beak.

7. In a. sewing machine, in combination, areciprocating needle, a circularly moving loop-taker provided with a loop-seizing beak, a thread-case journaled therein, means for restraining the thread-case against turning with the loop -taker, a reciprocating opening member for interrupting engagement of the thread-case with its holding.

means, and a loop-support sustained" by said opening member and adapted to hold out of the range of action of the oint thebeak a needle-thread loop cast 0 by thebeak.

8. In a sewing machine, in combination, a reciprocating needle, a circularly moving loop-taker provided with a loop-seizmg beak, a thread-case journalcd therein, means for restraining the thread-case against'turm ing with the loop-taker, a reciprocating opening member for interrupting engagement of the thread-case with its holding means, a loop-support sustained hysai opening member and adapted to hold out of the range of action of the point of thebeak a needle-threml loop cast off by the beak, an

partaking of the circular movements of said loo J-taker and an o erativc connectlon be- 1 fhoving I "beak and to hold it out tvi eensaid actuating element and the ppening member.

9.; In a sewing machine, in combination, a

reciprocating needle, a circularly moving loop-taker provided with a loop-seizing beak, a thrcad-case journaled therein, means for restraining the threadcase against turnit? with the loop-taker, a lower thread pull- 0 loop-taker, and a loop-support sustained in element movable independently of the fixed relation With said pull-oil element and adapted to hold out of the range of action of the point of the beak a needle-thread loop previously cast off by the beak.

10. In a sewing machine, in combination, a reciprocating needle, a circularly moving loop-taker provided with a loop-seizing beak, a thread-case journaled therein, means for restraining the thread-case aga inst turning with the loop-taker, a reciprocating opening member for interrupting engagement of the thread-case with its holding means, a lower-thread pull-ofi' element sustained by and movable with said member, and 'a loop-support sustained by said opening member and adapted to hold out of the range of action of the point of the beak a needle-thread loop cast off by the beak.

11. In a sewing machine, in combination, a reciprocating needle, :1 loop-taker pro-- vided with a loop-seizing beak, actuating means for imparting to the loop-taker a plurality of excursions from loop-seizing position for each reciprocation of the neodle, and a plurality of fingers sustained adjacent the needle-path, the one being adapted to shield the point of the looptaker beak and the other to sustain a needlethread loop cast ofi by the loop-taker beak and to hold it out of the range of action of the latter in-a succeeding excursion.

12. In a sewing machine, in combination, a reciprocating needle, a loop-taker provided with a loop-seizing beak, actuating means for imparting to the loop-taker a plurality of excursions from 100 -seizing position for each reciprocation o the needle, and a red rocating member sustained at one side 0 the path of movement of the loo -taker beak and adjacent the needlepat and formed in the side adjacent the loop-taker with an undercut recess reducing oppositely extending fingers 0 which I the one is adapted to shield the point of theloop-taker beak and the other to sustain a needle-thread loop cast of by the loop-taker of the range of action of the latter in a succeeding excursion.

13. In a sewing machine, in combination, a reciprocating needle, a circularly moving loo -ta.ker provided with a loop-seizing beali, .a thread-case journaled therein, actuating means for imparting to the loop-taker a plurality of excursions from loop-seizing mmmgw pmsiti un for each reciprocation f the new 1.12, .lineama for restmining the thmnfim 1e 'n'nst turning with the liwgmtaker, i m, n .u'ocat'ing mmnber sustailmd at one k, v patlilv of movenjnent of Lh lfmp-llflkfll beak and 1;).11'0Vid0d with a shoulder euga .ing the thread-case to interrupt its contract with the l'lold-ing means and fornmd. in the side adjacent the loopwaker with an undercut morass producing appositely exbu' fingzars of M11011 one adapted to shield he po' m of the loop-taker beak: and the @thm? aim a needle-thread 100p cast off by to :1; the 100 mm beak and to hold it out of the rz'imge of action of the latter in a, ceeding excursion.

1-1 In 21 Sewing machine, in combhmtiml, .ipracating needle, :1 circularly n'mving mixer pirr. vi.d' d with 'a Imp-seizing .1 chm! "iournaled therein, w? x Wan fng to the loop-i 1'; (ms fmjvm. loop-seiz 1g us nhh reciprocmzwn of 11114; 11eatraining the threads-awe w 1th the loop-taker, a re MP,

(1k, ITHEBELIIS t turning 511g mex'uber" sustained at one' mth of, .uwwmrent oi the loop d W] h a shmlldey e1 its 0 fingers of which one is adapted to shield point of the lnuptaker beak and the wt 2:0 5min needle-thread 100p cast 015 )3 M. hmp't-aketb'beuk and t0 huld it out mi flagran -gr: of action of the latter in a, sum wading excursion, an actuating elcmsmt rig-- idly cmmected to and partaking of the cir-- cuiar linovel'a'lel'ms of said loopwaker, and. an operative connection between. said actuating Element ami the reciprocating member.

15, In a, sewing maehine, in combinatim'l, a reciprocating needle, a rotary loop-baker mounted for movement in a plane trauw verse to the needlmpath mid fomned with a. cup-shaped body having a peripheral flangepoption merging into 'a loopseizing beak and a, ,second peripheral flange-portion n'lergmg mto a tork dls osed nrxamly m rear of the beak-110mb, saw fork comm-mg a.

gnmrd-finger disposed below the plane of- 

